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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

Infineon Technologies TLE46782ELXUMA1

Name: TLE46782ELXUMA1
Brand: Infineon Technologies
SKU: TLE46782ELXUMA1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TLE46782ELXUMA1

Manufacturer:: Infineon Technologies

Category:: Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

Package:: 14-LSSOP (0.154", 3.90mm Width) Exposed Pad

Datasheet:: TLE46782ELXUMA1.pdf

Description:: IC REG LINEAR 5V 200MA SSOP-14-2

Quantity:: RFQ Add To RFQ list

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Inventory:5,000

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Product details

Overview

TLE46782ELXUMA1 from Infineon Technologies is an automotive-grade monolithic low-dropout linear voltage regulator delivering a fixed 5 V ±2% output at up to 200 mA, featuring integrated reset and watchdog functions, reverse polarity protection, short-circuit and overtemperature shutdown, and operation across −40 °C to +150 °C junction temperature. It accepts input voltages from −14 V to +45 V and supports microcontroller power sequencing in engine control units.

For engineers reviewing the TLE46782ELXUMA1 datasheet, TLE46782ELXUMA1 pinout, TLE46782ELXUMA1 application, or TLE46782ELXUMA1 equivalent, key selection criteria include its programmable reset threshold (via RADJ), load-dependent watchdog activation (via WADJ), open-collector reset/watchdog outputs (RO/WO), ultra-low quiescent current, and PG-SSOP14 thermal performance with exposed pad grounding.

Technical Context

The device integrates three functional blocks: a LDO regulator with bandgap reference and current-limiting protection; a reset generator monitoring output voltage via RADJ-adjustable threshold and capacitor-timed delay on pin D; and a watchdog circuit triggered by positive edges on WI and activated only above a user-set current threshold via WADJ.

Its architecture enables fail-safe microcontroller supervision: RO asserts active-low reset down to VQ = 1 V; WO remains disabled during MCU standby (low I_Q); and both outputs feature internal pull-ups to Q, eliminating external bias for basic use cases while supporting optional external pull-ups for noise immunity or level-shifting.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	5 V ±2% - stable supply for 5 V logic and analog subsystems without external feedback
Max Output Current	200 mA - sufficient for MCU cores, CAN transceivers, and sensor interfaces in ECUs
Dropout Voltage	Typ. 250 mV @ 200 mA - enables regulation down to VI = 5.25 V, critical for cold-crank conditions
Input Voltage Range	−14 V to +45 V - supports reverse-battery protection and load-dump immunity per ISO 7637-2
Quiescent Current	Typ. 90 µA - enables always-on functionality in vehicle body modules with low standby power
Reset Threshold Accuracy	±3% programmable via RADJ - allows precise brown-out detection aligned to MCU VDD tolerance
Watchdog Timeout	Adjustable via capacitor on D pin - configurable timing for MCU firmware execution monitoring

Pinout & Package

Supplied in PG-SSOP14 package with thermally enhanced exposed pad (internally connected to GND), optimized for automotive PCB layouts requiring high thermal reliability and compact footprint.

Pin/Terminal	Circuit Role	Design Meaning
1 WO	Watchdog Output	Open-collector output pulled internally to Q; signals MCU hang condition; requires no external pull-up unless level-shifting needed
3 WADJ	Watchdog Activation Threshold	Resistor-to-GND sets current threshold below which watchdog disables - enables automatic standby mode entry
4 GND	Ground Reference	Primary IC ground; must be connected to PCB heatsink area and exposed pad for thermal and EMI performance
5 D	Timing Capacitor Node	Connects external ceramic capacitor to GND to set both reset delay and watchdog timeout period
7 RADJ	Reset Threshold Adjust	Voltage divider from Q to GND sets reset activation point; direct GND connection uses internal default threshold
8 WI	Watchdog Input	Positive-edge-triggered feed from MCU - must toggle within timeout window to prevent WO assertion
10 Q	Regulated Output	5 V output; requires local 10 µF/≤3 Ω ESR ceramic capacitor for stability under dynamic load
12 I	Input Supply	Accepts −14 V to +45 V; needs local decoupling capacitor near pin to suppress line transients
14 RO	Reset Output	Open-collector output pulled internally to Q; asserts low when VQ drops below RADJ-set threshold

Key Features

Feature	Design Value
Integrated Reset + Watchdog	Dual independent supervision functions share timing capacitor (pin D) but use separate outputs (RO/WO) and adjustment pins (RADJ/WADJ)
Reverse Polarity Protection	Operates safely with −14 V applied to pin I - eliminates need for external series diode in battery-connected systems
Load-Dependent Watchdog Enable	Automatically disables watchdog when output current falls below WADJ-set threshold - reduces false triggers during MCU sleep
AEC-Q100 Qualified	Qualified to Grade 0 (−40 °C to +150 °C) - validated for under-hood ECU applications including transmission and engine control
Thermal Shutdown	Activates at T_j ≥ 165 °C (hysteresis ~15 °C) - protects against sustained overload or poor heatsinking

Applications

Engine Control Unit (ECU)

Body Control Module (BCM)

Use Scenario: Powers 5 V MCU core and peripheral sensors in gasoline/diesel engine management systems exposed to wide ambient and transient voltage conditions.

IC Role / Device Role / Timing Role: Primary 5 V LDO with integrated reset and watchdog; provides brown-out detection, software hang recovery, and cold-crank support.

Use Value: Eliminates need for discrete reset IC and external watchdog timer; reduces BOM count and PCB area while meeting ISO 16750-2 load-dump requirements.

Use Scenario: Supplies door module MCUs and LIN transceivers in vehicle body electronics where low quiescent current and reverse-battery resilience are mandatory.

IC Role / Device Role / Timing Role: Always-on 5 V regulator with programmable reset delay and standby-aware watchdog; manages power sequencing during ignition cycles.

Use Value: Enables <90 µA standby current and survives −14 V reverse connection - extends battery life and prevents field failures from jump-start errors.

Transmission Control Unit (TCU)

Advanced Driver Assistance System (ADAS) Camera ECU

Use Scenario: Regulates power for transmission solenoid drivers and position sensors operating in high-temperature transmission tunnel environments.

IC Role / Device Role / Timing Role: High-reliability 5 V supply with overtemperature shutdown and robust line transient immunity (dV/dt up to 20 V/µs).

Use Value: Maintains regulation during gear-shift transients and sustains operation up to 150 °C junction temperature - avoids system resets during aggressive driving.

Use Scenario: Powers image signal processor and serializer in rear-view or surround-view camera modules mounted near exhaust or wheel wells.

IC Role / Device Role / Timing Role: Compact 5 V LDO with exposed-pad thermal path and AEC-Q100 Grade 0 qualification for under-vehicle mounting.

Use Value: Delivers stable 5 V with ≤250 mV dropout at full load and 153 K/W R_thJA on standard FR4 - ensures thermal margin without heatsinks in space-constrained enclosures.

Equivalent & Alternatives

The following parts are listed as comparable options for similar automotive LDO-with-supervision applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TLV70733PDPWR	3.3 V fixed output, 300 mA, no integrated reset/watchdog, SOT-23-5 package	Lacks supervision functions; requires external reset IC and smaller thermal footprint	Select only if 3.3 V output and minimal board area are prioritized over integrated safety features
MAX16135ATA+T	5 V output, 250 mA, integrated reset only (no watchdog), 10-pin TDFN package	Missing watchdog function and reverse-polarity protection; higher R_thJA (180 K/W)	Choose when watchdog is unnecessary and cost is more critical than thermal performance or fault coverage

Compared with TLV70733PDPWR and MAX16135ATA+T, TLE46782ELXUMA1 uniquely combines 5 V LDO, dual independent reset/watchdog, reverse-polarity tolerance, and AEC-Q100 Grade 0 in one PG-SSOP14 package - making it the only option for safety-critical automotive applications requiring full supervision and ruggedized input handling.

Availability

TLE46782ELXUMA1 is available at Aetrix Electronics and suitable for engine control units, body control modules, and transmission control units requiring stable component supply under automotive environmental stress and long product lifecycles.

Supply support for TLE46782ELXUMA1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Infineon Technologies is a German semiconductor manufacturer specializing in power management, automotive electronics, and security solutions, with global manufacturing and automotive qualification infrastructure.

TLE46782ELXUMA1 belongs to Infineon's automotive power management IC portfolio, designed specifically for single-chip power and supervision of microcontrollers in harsh-temperature, high-transient automotive environments.

FAQ

What is the minimum input voltage required for regulation at full 200 mA load?

The minimum input voltage is V_Q + V_dr, where V_Q = 5 V and typical dropout V_dr = 250 mV. Thus, regulation is guaranteed at VI ≥ 5.25 V. At lower inputs, output follows input (extended range mode), but V_Q is unregulated and may fall outside ±2%.

Can the watchdog function be completely disabled without affecting reset operation?

Yes. Connect WADJ (pin 3) directly to GND and leave WI (pin 8) unconnected or tied to GND. This disables watchdog activation and timing, while reset functionality remains fully operational via RADJ (pin 7) and capacitor D (pin 5).

Is an external capacitor required on the Q output pin, and what are its specifications?

Yes. A minimum 10 µF ceramic capacitor with ESR ≤3 Ω at 10 kHz must be placed adjacent to pin 10 (Q). This ensures loop stability under dynamic load steps and meets ripple rejection requirements specified in the datasheet's electrical characteristics table.

How does the exposed thermal pad on the PG-SSOP14 package connect electrically?

The exposed pad is internally connected to GND (pin 4). It must be soldered to a PCB copper pour tied to the system ground plane and used as the primary thermal path. No isolation or floating connection is permitted - doing so degrades thermal resistance by >40% and risks overheating.

TLE46782ELXUMA1 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: OPTIREG™

Package/Case:: 14-LSSOP (0.154", 3.90mm Width) Exposed Pad

Packaging:: Tape & Reel (TR)

Product Status:: Active

Output Configuration:: Positive

Output Type:: Fixed

Number of Regulators:: 1

Voltage - Input (Max):: 45V

Voltage - Output (Min/Fixed):: 5V

Voltage - Output (Max):: -

Voltage Dropout (Max):: 0.3V @ 150mA

Current - Output:: 200mA

Current - Quiescent (Iq):: 80 µA

Current - Supply (Max):: 6 mA

PSRR:: 65dB (100Hz)

Control Features:: Reset, Watchdog

Protection Features:: Over Current, Over Temperature, Reverse Polarity, Short Circuit

Operating Temperature:: -40°C ~ 150°C

Grade:: Automotive

Qualification:: AEC-Q100

Mounting Type:: Surface Mount

Supplier Device Package:: PG-SSOP-14-2

TLE46782ELXUMA1 FAQ

1.How can I place an order for TLE46782ELXUMA1 through Aetrix?

Please submit a Request for Quotation (RFQ) for TLE46782ELXUMA1 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for TLE46782ELXUMA1 reliable?

The price and inventory of TLE46782ELXUMA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLE46782ELXUMA1 is usually 5 days.

3.What payment methods are accepted for TLE46782ELXUMA1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLE46782ELXUMA1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TLE46782ELXUMA1?

TLE46782ELXUMA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TLE46782ELXUMA1 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for TLE46782ELXUMA1?

For technical support, including TLE46782ELXUMA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLE46782ELXUMA1 requirements.

6.How does Aetrix verify that TLE46782ELXUMA1 is sourced from the original manufacturer or authorized distributors?

All TLE46782ELXUMA1 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TLE46782ELXUMA1 meets industry standards.

7.What is the process for return or replacement of TLE46782ELXUMA1?

All TLE46782ELXUMA1 units undergo pre-shipment inspection (PSI). If there is an issue with TLE46782ELXUMA1, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The TLE46782ELXUMA1 part is unused and in its original packaging.

Return procedure for TLE46782ELXUMA1:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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